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Abstract:

To date, the only known Triassic tetrapod footprints in Patagonia are those from the Los Menucos Basin, Río Negro province. The footprints occur at several levels in the Vera Formation in finegrained tuffaceous sandstones interbedded with tuffaceous mudstones that contain a rich "Dicroidium-type Flora". A revision of the original material described by Casamiquela and study of undescribed specimen from the same locality are presented herein. Previous assumptions about the large number of tetrapod groups represented by the footprint assemblage are not corroborated by the available evidence. However, this new analysis supports former propositions about the relative abundance and high diversity of small therapsids, probably theriodonts. This footprint assemblage suggests a unique Late Triassic tetrapod fauna in northern Patagonia, in which archosaurs (basal archosaurs and dinosaurs) were not the dominant component as in most known Late Triassic Gondwanan tetrapod faunas. This unusual situation might be either the result of a taphonomic bias or the record of an endemic fauna actually dominated by therapsid taxa. © Asociación Paleontológica Argentina.

Registro:

Documento: Artículo
Título:Tetrapod footprints from the Triassic of Patagonia: Reappraisal of the evidence
Autor:Domnanovich, N.S.; Marsicano, C.A.
Filiación:Laboratorio de Paleontología de Vertebrados, Departamento de Ciencias Geológicas, Universidad de Buenos Aires, Pabellon II Ciudad Universitaria, 1428 Buenos Aires, Argentina
Palabras clave:Argentina; Late Triassic; Patagonia; Tetrapod footprints; Therapsids; fauna; footprint; mudstone; sandstone; tetrapod; Triassic; Argentina; Los Menucos; Patagonia; Rio Negro [Argentina]; South America; Dicroidium; Dinosauria; Tetrapoda; Therapsida
Año:2006
Volumen:43
Número:1
Página de inicio:55
Página de fin:70
Título revista:Ameghiniana
Título revista abreviado:Ameghiniana
ISSN:00027014
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v43_n1_p55_Domnanovich

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Citas:

---------- APA ----------
Domnanovich, N.S. & Marsicano, C.A. (2006) . Tetrapod footprints from the Triassic of Patagonia: Reappraisal of the evidence. Ameghiniana, 43(1), 55-70.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v43_n1_p55_Domnanovich [ ]
---------- CHICAGO ----------
Domnanovich, N.S., Marsicano, C.A. "Tetrapod footprints from the Triassic of Patagonia: Reappraisal of the evidence" . Ameghiniana 43, no. 1 (2006) : 55-70.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v43_n1_p55_Domnanovich [ ]
---------- MLA ----------
Domnanovich, N.S., Marsicano, C.A. "Tetrapod footprints from the Triassic of Patagonia: Reappraisal of the evidence" . Ameghiniana, vol. 43, no. 1, 2006, pp. 55-70.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v43_n1_p55_Domnanovich [ ]
---------- VANCOUVER ----------
Domnanovich, N.S., Marsicano, C.A. Tetrapod footprints from the Triassic of Patagonia: Reappraisal of the evidence. Ameghiniana. 2006;43(1):55-70.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v43_n1_p55_Domnanovich [ ]